The UV Bandpass Filters is a filter whose two sides of the transmission band of the spectral characteristic curve are adjacent to the cut-off band. Bandpass filters are roughly divided into broadband filters and Narrow Bandpass Filters according to their spectral characteristics. Both filters are usually combined. The bandpass filter is prepared by the principle of light wave interference. The pass filter has been widely used in various fields, such as infrared detection, machine vision light source, water quality detection, driverless cars.